chore: clarify kotlin-jpa plugin introduction (#1762)
chore: clarify kotlin-jpa plugin introduction (#1762)

One might wrongly understand that *kotlin-spring* is also wrapped on top of *no-arg*, which is not the case since it's a subplugin of *allopen*.

I'm not a native english speaker, so rephrasing suggestions are welcome.
JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,JetBrains/kotlin-web-site